Finding a secret doesn't give you the right to use it. When in doubt, report it.
Here is the content you requested regarding the search query site:pastebin.com + apartments.com . site%3apastebin.com+apartments.com
You run site:pastebin.com "apartments.com" "api key" and find a paste from 2 days ago containing a live Stripe secret key. Finding a secret doesn't give you the right to use it